沉积物中多环芳烃和有机氯农药赋存状态  

The distribution state of PAHs and organochlorine pesticides in sediments

作　　者：吴启航[1,2] 麦碧娴[1] 杨清书[1] 彭平安[1] 傅家谟[1] 

机构地区：[1]中国科学院广州地球化学研究所,有机地球化学国家重点实验室,广东广州510640 [2]广州大学市政和环境工程系,广东广州510405

出　　处：《中国环境科学》2004年第1期89-93,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(40272129);广东省自然科学基金资助项目(010504)

摘　　要：对珠江广州河段高污染沉积物进行粒度分级,对不同粒径的样品重液分离,收集轻组分(有机质)和重组分(主要为无机矿物及无定型有机质).用显微镜对沉积物中不同粒径轻重组分的吸附剂进行鉴定,测定其中的多环芳烃(PAHs)和有机氯农药(OCPs).结果表明,沉积物样品中有机质占总重量9.1%,富集了81.5%的多环芳烃,77.2%的有机氯农药;无机矿物和无定型有机质占90.9%,富集了18.5%的多环芳烃,22.8%的有机氯农药;轻组分中的有机吸附剂对PAHs和OCPs的富集能力比重组分无机矿物和无定型有机质高1～2个数量级.The highly polluted sediment in Guangzhou section of the Pearl River was graded on size; and samples of different particle diameter were separated with density to collect low density fraction (organic matter) and high-density fractions (mainly inorganic mineral and amorphous organic matter). The sorbents of these fraction were identified with microscope to determine polycyclic aromatic hydrocarbons (PAHs) and organochlorine pesticides (OCPs). The organic matter in sediment sample occupied 90.9%, accumulating 18.5% PAHs and 22.8% OCPs. The capacity of accumulating PAHs and OCPs of organic sorbents of low density fraction was 1~2 orders of magnitude higher than that of high density fraction.

关 键 词：多环芳烃(PAHs) 有机氯农药(OCPs) 沉积物 

分 类 号：X592[环境科学与工程—环境工程]